and one of our justice producers is saying there is not an arrest yet, apprehension, an arrest, miranda rights being processed, these can all mean different things to different people in the cloud of this. but i am told by a boston law enforcement source that they believe that they have the suspect. >> with anderson cooper here now, word of an arrest here and the boston marathon attacks. we have heard the u.s. federal marshals have taken the suspect to the courthouse that would be obvious procedure in a federal investigation. we believe it all started with videotape they were analyzing from a store across the street from the second explosion, we believe it was a lord & taylor, a man was identified, putting down something that officials believe proximated the type of bag that was holding what they thought was an explosive device in one of these that we have been showing you all morning. one of these pressure cookers. and they found him. we're not exactly sure. we don't know what the procedure was, what they cross referenced to find this particular individual. juliette and john said may h